45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
use garage_rpc::layout::*;
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use garage_util::data::*;
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/// Trait to describe how a table shall be replicated
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pub trait TableReplication: Send + Sync + 'static {
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type WriteSets: AsRef<Vec<Vec<Uuid>>> + Send + Sync + 'static;
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// See examples in table_sharded.rs and table_fullcopy.rs
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// To understand various replication methods
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/// The entire list of all nodes that store a partition
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fn storage_nodes(&self, hash: &Hash) -> Vec<Uuid>;
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/// Which nodes to send read requests to
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fn read_nodes(&self, hash: &Hash) -> Vec<Uuid>;
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/// Responses needed to consider a read succesfull
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fn read_quorum(&self) -> usize;
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/// Which nodes to send writes to
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fn write_sets(&self, hash: &Hash) -> Self::WriteSets;
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/// Responses needed to consider a write succesfull in each set
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fn write_quorum(&self) -> usize;
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fn max_write_errors(&self) -> usize;
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// Accessing partitions, for Merkle tree & sync
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/// Get partition for data with given hash
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fn partition_of(&self, hash: &Hash) -> Partition;
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/// List of partitions and nodes to sync with in current layout
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fn sync_partitions(&self) -> SyncPartitions;
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}
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#[derive(Debug)]
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pub struct SyncPartitions {
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pub layout_version: u64,
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pub partitions: Vec<SyncPartition>,
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}
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#[derive(Debug)]
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pub struct SyncPartition {
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pub partition: Partition,
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pub first_hash: Hash,
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pub last_hash: Hash,
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pub storage_nodes: Vec<Uuid>,
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}
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